CVE-2026-116689

Full vulnerability record from the local CVENow database.

Description

follow-redirects is a Node.js HTTP and HTTPS client wrapper that automatically follows redirects. From 1.16.0 until 1.16.2, the documented sensitiveHeaders option is checked with value instanceof Array, so an array created in another JavaScript realm is replaced with an empty list even though Array.isArray recognizes it. When a request then follows an attacker-controlled cross-origin redirect, a custom credential header named in that discarded list can be forwarded to the redirect destination. This issue is fixed in version 1.16.2.

Severity

MEDIUM

CVSS score

5.9 (v3.1)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-10-27 20:17:14.177000

Last modified

2026-10-28 15:24:56.033000

View original CVE JSON

{
  "id": "CVE-2026-116689",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-27T20:17:14.177",
  "lastModified": "2026-10-28T15:24:56.033",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "follow-redirects is a Node.js HTTP and HTTPS client wrapper that automatically follows redirects. From 1.16.0 until 1.16.2, the documented sensitiveHeaders option is checked with value instanceof Array, so an array created in another JavaScript realm is replaced with an empty list even though Array.isArray recognizes it. When a request then follows an attacker-controlled cross-origin redirect, a custom credential header named in that discarded list can be forwarded to the redirect destination. This issue is fixed in version 1.16.2."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "follow-redirects",
          "product": "follow-redirects",
          "versions": [
            {
              "version": ">= 1.16.0, < 1.16.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-201"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/follow-redirects/follow-redirects/commit/b0a7751e9cd64cd8eeb6ec67d2f206a9cc88d3f8",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/follow-redirects/follow-redirects/releases/tag/v1.16.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/follow-redirects/follow-redirects/security/advisories/GHSA-mrwp-f3q8-3g9p",
      "source": "[email protected]"
    }
  ]
}